1971 vett. With a new 383 stroker motor 365HP new water pump and checked new thermostat had the stock aluminum S/B radiator flushed and presher checked new fluids. With out the hood on an after running for 15 minutes she hits 220+degrees. Thats the car running in the shop. I'm wondering if the hood being off and car running in the shop might part of the problem or I might need a bigger radiator.thanks kk.